Effect of sintering on the microstructure and mechanical properties of alloy titanium-wollastonite composite fabricated by powder injection moulding process

Mohd Ikram Ramli, Abu Bakar Sulong, Norhamidi Muhamad, Andanastuti Muchtar, Mohd Yusuf Zakaria

Research output: Contribution to journalArticle

Abstract

Composite biomaterials are in high demand in the medical field of today. The combination of bioactive wollastonite (WA) glass ceramic with the biocompatibility of alloy titanium (Ti6Al4V) could be a good candidate for implant applications. The rheological properties of Ti6Al4V/WA feedstock show a pseudoplastic behaviour with low activation energy. The feedstock was successfully injected as a green part with no defects. The green part was solvent debound for 6 h in heptane and thermal debound in an argon environment for 1 h. The brown part was successfully sintered at 1300 °C for 3 h with 5 °C/min heating and cooling rates. The average sintered density was 4.12 g/cm 3 ; which is 97.5% from the theoretical density. The highest Young's modulus obtained was 18.10 GPa; which is in the range of human bone strength. EDX analysis shows that by increasing sintering temperature, the level of oxygen decreased. Cell viability test shown an absorbance increased with days increasing indicated that the cellular were proliferated on the composite Ti6Al4V/WA composite which also proved that the composite was non-toxic. This indicates that the Ti6Al4V/WA composite is suitable for bone implant applications.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusPublished - 1 Jan 2019

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Titanium alloys
Injection molding
Powders
Sintering
Mechanical properties
Microstructure
Composite materials
Feedstocks
Bone
Heptanes
Bioactive glass
Argon
Biocompatible Materials
Glass ceramics
Heptane
Biocompatibility
Biomaterials
Energy dispersive spectroscopy
Activation energy
Elastic moduli

Keywords

  • Mechanical properties
  • Microstructure
  • Powder injection molding
  • Sintering
  • Ti6Al4V/WA composite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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abstract = "Composite biomaterials are in high demand in the medical field of today. The combination of bioactive wollastonite (WA) glass ceramic with the biocompatibility of alloy titanium (Ti6Al4V) could be a good candidate for implant applications. The rheological properties of Ti6Al4V/WA feedstock show a pseudoplastic behaviour with low activation energy. The feedstock was successfully injected as a green part with no defects. The green part was solvent debound for 6 h in heptane and thermal debound in an argon environment for 1 h. The brown part was successfully sintered at 1300 °C for 3 h with 5 °C/min heating and cooling rates. The average sintered density was 4.12 g/cm 3 ; which is 97.5{\%} from the theoretical density. The highest Young's modulus obtained was 18.10 GPa; which is in the range of human bone strength. EDX analysis shows that by increasing sintering temperature, the level of oxygen decreased. Cell viability test shown an absorbance increased with days increasing indicated that the cellular were proliferated on the composite Ti6Al4V/WA composite which also proved that the composite was non-toxic. This indicates that the Ti6Al4V/WA composite is suitable for bone implant applications.",
keywords = "Mechanical properties, Microstructure, Powder injection molding, Sintering, Ti6Al4V/WA composite",
author = "Ramli, {Mohd Ikram} and Sulong, {Abu Bakar} and Norhamidi Muhamad and Andanastuti Muchtar and Zakaria, {Mohd Yusuf}",
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AU - Sulong, Abu Bakar

AU - Muhamad, Norhamidi

AU - Muchtar, Andanastuti

AU - Zakaria, Mohd Yusuf

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AB - Composite biomaterials are in high demand in the medical field of today. The combination of bioactive wollastonite (WA) glass ceramic with the biocompatibility of alloy titanium (Ti6Al4V) could be a good candidate for implant applications. The rheological properties of Ti6Al4V/WA feedstock show a pseudoplastic behaviour with low activation energy. The feedstock was successfully injected as a green part with no defects. The green part was solvent debound for 6 h in heptane and thermal debound in an argon environment for 1 h. The brown part was successfully sintered at 1300 °C for 3 h with 5 °C/min heating and cooling rates. The average sintered density was 4.12 g/cm 3 ; which is 97.5% from the theoretical density. The highest Young's modulus obtained was 18.10 GPa; which is in the range of human bone strength. EDX analysis shows that by increasing sintering temperature, the level of oxygen decreased. Cell viability test shown an absorbance increased with days increasing indicated that the cellular were proliferated on the composite Ti6Al4V/WA composite which also proved that the composite was non-toxic. This indicates that the Ti6Al4V/WA composite is suitable for bone implant applications.

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